MTTE-based motion stabilization control for in-wheel motor electric vehicles

In the motion control of electric vehicles, it has been demonstrated that Direct Yaw Moment Control (DYC) is an effective and practical way to enhance the two-dimensional stabilization of electric vehicles. However, most of the research did not provide a complete approach to calculate the input variables, that is, the effective driving torques, the vehicle velocity, and the road-tire fiction coefficient. This study shows that the traction control based on Maximum Transmission Torque Estimation (MTTE) can not only constrain the slip to improve the longitudinal friction force and lateral friction force, but also provide some information on tire-road conditions, which can ensure the performance and the effectiveness of two-dimensional motion control. Additionally, this paper proposes a new DYC based on MTTE technology for electric vehicles. The experiments on traction control, the numerical simulation of the whole control system, and the theoretical analysis demonstrated its effectiveness and feasibility will be presented.